每本书都是通往另一个世界的门,等待着好奇的心灵去开启。
可持续性不是一种选择,而是我们对后代的责任。
We don't inherit the earth from our ancestors; we borrow it from our children.
To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.